/**
 * Copyright (C) 2008 Christopher Allen Ogden
 *
 *     This file is part of Odysi.
 *
 *  Odysi is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Odysi is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Odysi.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include <SDL_mixer.h>
#include <stdexcept>
#include "singleton.h"

class MusicManager:public Singleton<MusicManager>
{
    public:
        /**
         * Constructor.
         */
        explicit MusicManager():
            _music(NULL)
        {
        }

        /**
         * Destructor.
         */
        ~MusicManager()
        {
            if (_music) {
                Mix_FreeMusic(_music);
            }
        }

        /**
         * Fade in a music file.
         *
         * @param file  The filename of the music to fade in.
         * @param time  How long to fade in over.
         */
        void fadeIn(const std::string &file, int time)
        {
            if (_music) {
                Mix_FreeMusic(_music);
            }

            _music = Mix_LoadMUS(file.c_str());
            if (!_music) throw std::runtime_error(Mix_GetError());

            if (Mix_FadeInMusic(_music, -1, time)) throw std::runtime_error(Mix_GetError());
        }

        /**
         * Pointer operator.
         *
         * @return  A pointer to the music object.
         */
        operator Mix_Music*() const
        {
            return _music;
        }
    private:
        Mix_Music *_music;
};
